v3.26.1
Financial Instruments and Risk Management (Narrative) (Details)
€ in Millions, ¥ in Millions, ¥ in Millions, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jul. 14, 2026
USD ($)
Mar. 31, 2026
USD ($)
Sep. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
EUR (€)
Jun. 30, 2026
JPY (¥)
Apr. 30, 2026
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
JPY (¥)
Jun. 30, 2025
CNY (¥)
Sep. 30, 2024
EUR (€)
Dec. 31, 2023
JPY (¥)
Derivative [Line Items]                                
Current portion of long-term debt       $ 1,736.2 $ 1,929.9   $ 1,736.2                  
Proceeds from derivative instrument, investing activities         3.4                      
Proceeds from the sale of investments             400.0 $ 0.0                
Contingent consideration       463.6 371.6   463.6                  
Pre-tax net losses on cash flow hedges to be reclassified from AOCE into earnings in next twelve months             (7.0)                  
Subsequent Event                                
Derivative [Line Items]                                
Proceeds from the sale of investments $ 380.0                              
Block sale discount 2.70%                              
Subsequent Event | Scenario, Forecast                                
Derivative [Line Items]                                
Loss on disposition of equity interest     $ 27.4                          
Biocon Biologics                                
Derivative [Line Items]                                
Unrealized loss       (56.3)   $ 284.0 8.6 399.8                
Interest rate swaps                                
Derivative [Line Items]                                
Derivative, notional amount | €                             € 500.0  
Payments for derivative Instruments   $ 37.7                            
Respiratory delivery platform                                
Derivative [Line Items]                                
Contingent consideration       42.6 64.6   $ 42.6                  
Biocon Biologics                                
Derivative [Line Items]                                
Consideration transferred       815.0                        
Cash to acquire business       400.0                        
Equity issued to acquire business       415.0                        
Share lock up period             6 months                  
Idorsia Pharmaceuticals Ltd.                                
Derivative [Line Items]                                
Contingent consideration       421.0 307.0   $ 421.0                  
Net Investment Hedging                                
Derivative [Line Items]                                
Notional amount of derivative                 € 2,750.0 ¥ 40,000   € 2,850.0 ¥ 40,000      
Long-term debt                 3,500.0 40,000            
Maximum                                
Derivative [Line Items]                                
Derivative, term of contract             18 months                  
2027 Euro Senior Notes | Net Investment Hedging                                
Derivative [Line Items]                                
Notional amount of derivative | €                 850.0     850.0        
Long-term debt | €                 850.0              
2028 Euro Senior Notes | Net Investment Hedging                                
Derivative [Line Items]                                
Notional amount of derivative | €                 0.0     750.0        
Long-term debt | €                 750.0              
2032 Euro Senior Notes | Net Investment Hedging                                
Derivative [Line Items]                                
Notional amount of derivative | €                 1,250.0     € 1,250.0        
Long-term debt | €                 € 1,250.0              
YEN Term Loan                                
Derivative [Line Items]                                
Current portion of long-term debt       0.0 255.2   $ 0.0                  
Long-term debt       $ 246.1 $ 0.0   $ 246.1                  
YEN Term Loan | Net Investment Hedging                                
Derivative [Line Items]                                
Notional amount of derivative | ¥                   40,000     ¥ 40,000      
Long-term debt | ¥                   ¥ 40,000            
Interest rate swaps | Net Investment Hedging                                
Derivative [Line Items]                                
Derivative, notional amount | ¥                               ¥ 14,600
Currency Swap December 2026 | Net Investment Hedging                                
Derivative [Line Items]                                
Derivative, notional amount           200.0   200.0     $ 100.0     ¥ 1,420    
Currency Swap December 2027 | Net Investment Hedging                                
Derivative [Line Items]                                
Derivative, notional amount           $ 100.0   $ 100.0     50.0     ¥ 695    
Currency Swap December 2028 | Net Investment Hedging                                
Derivative [Line Items]                                
Derivative, notional amount                     $ 25.0          
Measurement Input, Discount Rate | Minimum                                
Derivative [Line Items]                                
Measurement input       0.090 0.085   0.090   0.090 0.090   0.085 0.085      
Measurement Input, Discount Rate | Maximum                                
Derivative [Line Items]                                
Measurement input       0.170 0.190   0.170   0.170 0.170   0.190 0.190